描述
DCS、PLC来的信号是在生产实时子系统模块内。生产实时的数据是海量的，它可以自成系统，自己设服务器，然后再与MIS系统的数据库相连。目前传输载体也是光纤或同轴电缆。敷设光纤在用光纤作为载体的MIS系统中，有些地方可能远离中心区域，但有少数数据也希望送到中心来显示，这时不用光纤，可以采用电话线传输网络的方式。
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